Improvement in nut-locks



R. P. THOMAS.

NUT-LOG K.

'.No.'174,323. Patent-ed Feb.29,1876.

ATTORNEYS N. PETERS. FfHOTO-UTHDGRAPHER, WASHINGTON. D C.

' UNITED STATES PATENT orrxca ROBERT 1 THOMAS, or BARNESVILLE, OHIO.

IMPROVEMENT lN NUT-LOCKS.

Specification forming part of Letters Patent N 0. 174,323, dated February 29, 1876 application filed I a 4 1 January 15, 1876. I

A To all whom it may concern:

. Improvement in Nut-Locks; and I do hereby declare that the following is a full, clear, and

exact description of 'the construction and operation of the same, reference'being had to the annexed drawings, making a part of this specification, andv to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a plan view of my nut-lock, and Fig. 2 is a longitudinal vertical sectional view of the same.

This invention has relation .to improvements in nut-locks which are designed to be used in connection with fish-bars, and for other ,purposes; and it consists in a slotted plate, which is provided with a raised flange on one end, at right-angles to the plate, and is passed over the screw-threaded end of the bolt-in advance of thenut. The latter being set up forcibly, the slotted plate is'driven up, so that the flange shall abut against'the nut, thus holding it from undue rotation, all as will be hereinafter more fully explained.

In the annexed drawing, "the letter A desig nates a wooden block. B is a broad-headed metallic and screw-threaded bolt. 0 isan ordinary 'nut applied upon the end of bolt B, and D is a locking-plate, the construction of which I shall hereinafter fully explain. As shown inFig. 2, bolt B passes through block A and projects a certain distance. It isof the usual well-known form used in railroad 'fislrplates, and is supplied with a nut, 0, upon its upper screw-threaded end a. Lockingplate 1), above alluded to, is a rectangular strip of metal, having a slot, b,'cut in its length, and provided with a raised flange or lip, c, on one end, at rightangles to the length of thesaid plate, and it is passed overthe projecting'end of the bolt in advance of the nut. The locking-plate is drawn away from the bolt, so as to allow the nut to be set up, which being accomplished, locking-plate D isdriven up toward the bolt until the lip c,- formed thereon, is brought in contact with a flat surface of the said nut, thereby locking the latter against rotation until the said plate is driven back a. sufficient distance, when it may be loosened, in the usual manner, by the will be provided upon its edges with a raised flange, 6, between which locking-plate D will be received, and by which it will be guided when beiiigdriven uponthe nut. Washer E is of rectangular form, and, being recessed into block, will be incapable of rotating independent thereof; consequently it will hold the said lock-plate against rotation, and when its lip is in contact with the nut, it will alsojprevent any rotation of the latter.

By this means a most effective lock is obtained for the nut, which is not only effective in its application ,to railroad lish-plates, but to many other similar purposes not herein.

necessary to specify.

I am aware that a bolt having a right and left hand screw-thread, with a space between them to receive a sliding, slotted lockingplate, provided with flanges and projections formed to fit into notches on the corners of the nuts, has heretofore been employed, and I therefore lay no claim to such invention.

What I claim as new, and desire to secure by Letters Patent, isl The washer E, IBCESSkd into block A, and having flanges z i,- in combination with the slotted locking-plate D, having lip 0, bolt B, and-nut U, substantially as and for the purpose set forth. In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses. 7

ROBERT P. THOMAS. Witnesses JAS. W. WALTON, EDWARD G. ADAMS. 

